The Masbate Sorsogon live mainly in Juban and Casiguran, Sorsogon (Bicol Region). An estimated 85,000 speak their language, which is based on the dialect of Naga City.
Wow! Bicol Philippines. http://www.wowbicol.com/.
Lewis, M. Paul (ed.), 2009. Ethnologue: Languages of the World, Sixteenth edition. Dallas, Tex.: SIL International. Online version: http://www.ethnologue.com/.